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音像Perl语言入门
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Preface
1.mtroduaion
estions and Answers
Is This the Right Book for You?
What About the Exercises and Their Answers?
What Iflm a Perl Course Instructor?
What Does "Perl" Stand For?
Why Did Larry Create Perl?
Why Didnt Larry Just Use Some Other Language?
Is Perl Easy or Hard?
How Did Perl Get to Be So Popular?
Whats Happening with Perl Now?
Whats Perl Really Good For?
What Is Perl Not Good For?
How Can I Get Perl?
What Is CPAN?
Is There Any Kind of Support?
What Ifl Find a Bug in Perl?
How Do I Make a Perl Program?
A Simple Program
Whats Inside That Program?
How Do I Compile My Perl Program?
A Whirlwind Tour of Perl
Exercises
2.Scalar Data
Numbers
All Numbers Have the Same Format Internally
Integer Literals
Nondecimal Integer Literals
Floating—Point Literals
Numeric Operators
Strings
Single—oted String Literals
Double—oted String Literals
String Operators
Automatic Conversion Between Numbers and Strings
Perls Built—In Warnings
Interpreting Nondecimal Numerals
Scalar Variables
Choosing Good Variable Names
Scalar Assignment
Compound Assignment Operators
Output with print
Interpolation of Scalar Variables into Strings
Creating Characters by Code Point
Operator Precedence and Associativity
Comparison Operators
The if Control Structure
Boolean Values
Getting User Input
The chomp Operator
The while Control Structure
The undef Value
The defined Function
Exercises
3.Lists and Arrays
Accessing Elements of an Array
Special Array Indices
List Literals
The qw Shortcut
List Assignment
The pop and push Operators
The shift and unshift Operators
The splice Operator
Interpolating Arrays into Strings
The foreach Control Structure
Perls Favorite Default: $
The reverse Operator
The sort Operator
The each Operator
Scalar and List Context
Using List—Producing Expressions in Scalar Context
Using Scalar—Producing Expressions in List Context
Forcing Scalar Context
<STDIN> in List Context
Exercises
4.Subroutines
Defining a Subroutine
Invoking a Subroutine
Return Values
Arguments
Private Variables in Subroutines
Variable—Lent&nsp;Parameter Lists
A Better &max Routine
Empty Parameter Lists
Notes on Lexical (my) Variables
The use strict Pragma
The feturn Operator
Omitting the Ampersand
Nonscalar Return Values
Persistent, Private Variables
Subroutine Signatures
Exercises
5.Input and Output
Input from Standard Input
Input from the Diamond Operator
The Double Diamond
The Invocation Arguments
Output to Standard Output
Formatted Output with printf
Arrays and printf
Filehandles
Opening a Filehandle
Binmoding Filehandles
Bad Filehandles
Closing a Filehandle
Fatal Errors with die
Warning Messages with warn
Automatically die—ing
Using Filehandles
Changing the Default Output Filehandle
Reopening a Standard Filehandle
Output with say
Filehandles in a Scalar
Exercises
6.Hashes
What Is a Hash?
Why Use a Hash?
Hash Element Access
The Hash as a Whole
Hash Assignment
The Big Arrow
Hash Functions
The keys and values Functions
The each Function
Typical Use of a Hash
The exists Function
The delete Function
Hash Element Interpolation
The %ENV hash
Exercises
7.Regular Expressions
Sequences
Practice Some Patterns
The Wildcard
ntiflers
Grouping in Patterns
Alternatives
Character Classes
Character Class Shortcuts
Negating the Shortcuts
Unicode Properties
Anchors
Word Anchors
Exercises
……
8.Matching with Regular Expressions
9.Processing Text with Regular Expressions
10.MoreControIStructures
11.PerlModules
12.FileTests
13.DirectoryOraios
14.Strings and Sorting
15.ProcessManagement
16.Some Advanced PerlTechniques
A.ExeraseAnswers
B.Beyond the Llama
C.A Unicode Primer
D.Experimental Features
Index
兰德尔·L·施瓦茨(Randal L.Schwartz),精通于软件设计、系统管理、安全、技术写作和培训,他是数本Perl语言方面“阅读”书籍的合著者之一,包括《Learning Perl》《Programming Perl》和《Mastering Perl》(O’Reilly出版)。
布赖恩·d·福瓦(brian d foy),是一位多产的Perl培训师和作家,运营ThePerlReview以帮人们使用和理解Perl。他是《Learning Perl》《Programming Perl》《Mastering Perl》(O’Reilly出版)和《EffectivePerlProgramming》(Addison—Wesley出版)的合著者之一。
汤姆·菲尼克斯(Tom Phoenix),在Stonehenge咨询服务公司教授Perl课程,并且在comp.lang.perl.misc和comp.lang.perl.moderated新闻组上回答问题。他是《Intermediate Perl》(O’Reilly出版)的合著者之一,也是一位Perl语言的贡献者。
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